See attachment below and this article: https://www.business-to-you.com/scanning-

See attachment below and this article: https://www.business-to-you.com/scanning-the-environment-pestel-analysis/ 
Included multiple references however also use the one in the attachment 
Notes gathered to help answer the questions: 
Why it is the most important factor? Show evidence. With examples and articles . Either an industry or a specific company. Use the 1 article (Use the reference already presented and others of course)
Basically the Pros and cons from the PESTEL analysis. 
Managers global perspective 
Real world example of a company global perspective